Best luck I have had with Prawns was to take the smaller ones (prawns, not shrimp) and used Pro-cure for shrimp. Dyes them really nice, red color, and I added some anise scent. They get even firmer, store very well in the freezer, and below a bobber on a jig are killer for steelhead.

Give it a try! I gave up on SS a long time ago. They stink, are very fragile, and all it takes is a smolt or sculpin to grab em and they are off the hook. I did have better luck using them when I would take a small thin rubber band and wrap them on the hook with it several times. Good luck! Also, when I used SS for salmon, I would take elastic thread and wrap them with it till there was not much on the hook but the thread, but it held the body and scent on there for multiple hook-ups without coming off. That is the perfect way to setup for Sturgeon too.!

MC